Pulverizing-machine



2 Sheets-Sheet 1.

(No Model.)

R. D. GATES. PULVERI'ZING MACHINE.

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N. PETERS. Pmtuxhognphn. wuhingzon, n. c.

(No Model.) 2 Sheets-Sheet 2..

Rm. GATES. PULVERIZING: MAGHINE.

No. 288,050. Padznted NGV.- 6, 1883.

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PU-LVERlZlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 288,050, dated November 6, 1883.

Application filed April 4, 1893. (No model.)

To all wlwnt it mag/concern.-

Be it known that I, RYERsoN D. citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois,l have invented anewand useful Improvement in Pulverizing-Machines, of which the following is a specification.

My invention relates to an improved construction and arrangement of the pulverizingmachine for which Letters Patent No. 260,092 were granted to me J une 27, 1882; and thenature ofthe same will be. fullyunderstood from the following description and claims, and annexed drawings, in which latter* Figure l is a vertical longitudinal section of my improved machine provided with two pairs of pulverizing-rollers. Fig. 2 is a plan view of the same. Fig. 3 is avertical section in the line w as, looking toward the roller-case.

Fig. ijs a diagram section in the line w w,

rollers together; and Fig. 5,a diagram section in the line ww, showing fourvvheels by which the rollers are geared together in pairs. Fig. 6 is a vertical longitudinal section, showing a machine similar to that represented in Figs. l, 2, and 3, excepting that two rollers instead of four, and suitable gearing for operating the same, are provided; and Fig. 7 is a vertical section of Fig. 6 in the line y y, looking to- Ward the roller-case.

In the accompanying drawings, A represents a stationary case of cylindrical form, adapted for containinga revolving screen, B, and C is another stationarycase of cylindrical form, adapted for containing two pairs of pulverizing-rollers, D D', asshown in Fig. l.

E is a frame adapted for supporting a central gear-shaft, F, carrying a Wheel, j, and Gr a driving-shaft,whioh carries atoothed Wheel, j', and a pulley, j, said frame E, shaft F, and the bearing-brackets iof the case C sustaining the yokes a., bearings a a2, shafts ai a, adjusting devices d, and pinions b b b2c c c o of the rollers. The central shaft, F, passes from supports at each end of the frame E through aspider, and the roller-oase C, and the screencase A, it being properly boxed, so as to be revolved by a gear-wheel, j, on one of its ends.

The shafts a3 and a* of the pulverizing-rollers are supported in boxes ce a2, which are fitted in the adjusting-yokes a on each side of the l case C, Whiehyokes are mounted upon brack- Gnrns a ets of said ease.

Two of the said shafts 'a3 and a* are extended on the geared side of the oase and fitted in the spider, through which the 'central shaft, F, passes loosely.

The respective pairs of rollers D and D carry toothed gear-wheels, the pair D being d'riveniby the gears c c, which are on the shafts a3 a3, while the pair D is driven by the gears `c o on shafts a* at. The shaft F has the gear- Wheel b applied on it, and above this gear on shaft ai the gear b is applied, Whilebelow said shaft F the gear b2 is applied on shaft at.

The means d, shown for adjusting the rollers toward and from one another, may be substantially the same as in my patent. hereinbe- `fore mentioned, or of any other known suitable construction. So, also, is the gearingfor matchingthe rollers in pairs, and the means for supporting the'bearing-boxes and yokes upon the case C. The shaft G is mounted upon the frame E, and on it are applied the pulley jg, a balance-Wheel, and a pinion, j, which latter gears With'the larger toothed wheel j on shaft F, and impartsinotion to the said shaft and the screenV B, and also to the pinion b', Wheels b and'bz, shafts a3 and c", by Wheels c c c c', Which cause the pulveringrollers D Di to revolve in pairs, one roller of one pair revolving against the revolving motion of the other of the lsame pair-in other Words, the rollers of a pair revolving toward each other.

rlhe cylindrical case A is supported by the frame E, being bolted'to it by means of its hanged portions o, While the case C is supported by the caseA by means of aside bracket, f, as shown in Fig. l; or it may be constructed separately and united to frame. E (by a stand, f', as shown in Fig. 6.

The case A is provided with a funnel-like discharge-passage, g, While the case C is provided ivith a hopper-like inlet-passage, h, and a chute-like outlet-passage, m, the passage h leading to the pulverizing-rollers D D', While the passage m leads through the ease A into the revolving screen B, which is fastened to the central shaft, F, and arranged to revolve Within the ease A, Vas shown.

The screen B is provided WitlrV-shaped buckets a, which are shown in side elevation in Figs. l and 6, and in end elevation by dotted ICO lines in Fig. 7. These buckets are, as in my former patent, hereinbefore referred to, set in relief from the wire-gauze p of the screen B, so that escape-spaces 'q are left ybetween their outer edges and the wire-gauze, as shown in Fig. 7. imperfectly pulverizedv substances, which are to be returned to the rollers D D', and the spaces g allow fully pulverized substances,

which are not lifted by the buckets n, to escapeapplied on roller-shaft a, meshes with the gear b on the shaft F, as shown in said Figs. 6 and 7.

In Fig. 6 thev case C is shown as provided with a secondary hopper, r, above the pair of rollers Dl D, and the chute, as H, entering the hopper h at top. l

From the foregoing specification, referring to Figs. 1, 2, 3, 4, and 5, it will be seen that the shaft G, on being revolved by pulley jz, sets in revolving motion shaft F through f toothed wheels j j', and said shaft F sets in motion the two pairs of pulverizing-rollers D D through the gear-wheels b b b2 and c c c c. The machine being thus set in motion, the substances to be pulverized are placed'y in the hopper h of the case C, and these substances, passing between the pairs of rollers D D', are pulverized, and, being pulverized, pass from said rollers down the chute fm into the revolving screen B, where the finely-pulverized or iinished part passes off through the meshes of the wire-gauze p into the screen-case A during the revolution of the screen, and this product descends to the bottom of said case A, and is discharged through the funnel-like passage g at the bottom of the same. Vhile the ne product is being screened, the partially-pul verized substances are collected by the buckets n, carried up to the top of the case A, discharged upon the chute H, and conducted back into the case C, to be further pulverized by the rollers D D, and from thence they are again passed into the screen, to be screened into and discharged from the case A through the funnellike passage g.

If only one pair of rollers is desired, the form The buckets serve as elevators fory esaoo of machine shown in Figs. 6 and 7 will be 6o and A; and I prefer to adopt such construction; but I do not conne myself thereto. rIhe central shaft, F, might be extended in length and be provided with a belt-pulley, and thus be operated directly instead'of by a shaft G.

What I claim as my invention, and desireto secure by Letters Patent, is-

l. The combination, with an outer ease, C,"

provided with inlet and .outlet passages, and supports for roller-shafts and pulverizing-rollers arranged within said' case, of the screenvcase provided with a return-chute anda discharge-passage, a revolving screen, B, having elevating devices, and the central shaft, F, passed through the cases A and C, and having gears applied to it for giving motion to the pulverizing-rollers and the screen, substantially as described.

2. The combination-of the roller-case C, pulverizing-rollers within said case, central shaft, F, passed th-roughthe case C, elevating-screen B, fastened to shaft F, chutes m and H, and gearing for connecting and revolving the screen and rollers, substantially as described.

3. The cylindrical screen-case A, inclosing and surrounding the screen, and provided with a discharge-passage, g, and a return-chute, H, in combination with a revolving screen, B, provided with elevating-buckets, the chute m,

and the central revolving shaft, F, substan-V tially as and for the purpose described.

4. The roller-case G and rollers within the case, in combination with ascreen-case, A, inclosing and surroundingthescreen, the revolving elevatingscreen .within the case, and the ,central revolving drivingshaft, F, said roller and screen cases being united to each other and provided with passages by which they communicatewith each other, and the shaft provided with suitable gears, whereby the rollers and screen are operated simultaneously, substantiallyy as described.

` RYERSON D. GATES. Witnesses:

HARRY LAIRD, E. O. Hasrniv.

IOO 

